2002

6.4

2004

7.2

2006

7.0

1961

4.0

1970

3.8

2013

7.1

2007

7.3

2007

3.8

1972

3.7

1993

5.0

1985

6.7

1965

6.0

1968

5.5

1930

6.8

1964

5.7

1984

3.3

2004

5.3

2000

5.1

2004

4.8

1969

5.1